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\textbf{Use Case I2:  Detailed Description}
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Use Case Name:  Manage a Mission\\
Scenario:  S2:  Start A Mission\\
Brief Description:  With the System Running, the User Starts a new
mission on the iButton device.  The System first stops a mission (if
a mission is already running), and then starts a new mission.\\
Actors:  User\\
Related Use Cases: N/A\\\\
Stakeholders:  Users who want to start a new mission on the iButton
for the purpose of new temperature/humidity data collection.\\\\
Preconditions:  The System is running, the iButton is connected to
the receptor or another reading device.  The iButton receptor or
other reading device is connected to the computer.\\\\
Postconditions:  A new Mission on the iButton is started.\\\\
\textbf{Flow of Events}\\\\
\begin{tabular}{|l|l|}\hline
\textbf{User} & \textbf{System}\\\hline
1.  Request to start a new mission on & \\
the iButton& \\\hline
& 2.  Stops the current mission\\
& (if a mission is running)\\\hline
& 3.  Starts a new mission by setting\\
& the default settins (for this system\\
& that includes rollover \textbf{not} enabled)\\\hline
& 4.  Indicates to the User a new \\
& iButton mission is stopped.\\\hline
\end{tabular}\\\\
\textbf{Exception Conditions}\\
2a.  If the Mission Cannot be stopped in the iButton, then the
system indicates the error to the user with a possible reason
(One Wire Network issues, One Wire Device issues).\\\\
3a.  If the new Mission Cannot be started in the iButton, then the
system indicates the error to the user with a possible reason
(One Wire Network issues, One Wire Device issues).
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